ENH: writeable and owndata flags

Author: ev-br

torch_np/_ndarray.py

@@ -120,7 +120,10 @@ def flags(self):
         is_f_contiguous = f_strides == self._tensor.stride()
 
         return Flags({"C_CONTIGUOUS": self._tensor.is_contiguous(),
-                      "F_CONTIGUOUS": is_f_contiguous,}
+                      "F_CONTIGUOUS": is_f_contiguous,
+                      "OWNDATA": self._tensor._base is None,
+                      "WRITEABLE": True,  # pytorch does not have readonly tensors
+        }
         )
 
     @property